Add missing created_at properties for other objects.

Such as Channel, PrivateChannel, Object and Role.

discord/channel.py

@@ -143,6 +143,11 @@ class Channel(Hashable):
         """str : The string that allows you to mention the channel."""
         return '<#{0.id}>'.format(self)
 
+    @property
+    def created_at(self):
+        """Returns the channel's creation time in UTC."""
+        return utils.snowflake_time(self.id)
+
     def permissions_for(self, member):
         """Handles permission resolution for the current :class:`Member`.
 
@@ -255,6 +260,11 @@ class PrivateChannel(Hashable):
     def __str__(self):
         return 'Direct Message with {0.name}'.format(self.user)
 
+    @property
+    def created_at(self):
+        """Returns the private channel's creation time in UTC."""
+        return utils.snowflake_time(self.id)
+
     def permissions_for(self, user):
         """Handles permission resolution for a :class:`User`.
 

discord/object.py

@@ -23,6 +23,8 @@ FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 DEALINGS IN THE SOFTWARE.
 """
 
+from .utils import snowflake_time
+
 class Object:
     """Represents a generic Discord object.
 
@@ -45,3 +47,8 @@ class Object:
 
     def __init__(self, id):
         self.id = id
+
+    @property
+    def created_at(self):
+        """Returns the private channel's creation time in UTC."""
+        return utils.snowflake_time(self.id)

discord/role.py

@@ -27,6 +27,7 @@ DEALINGS IN THE SOFTWARE.
 from .permissions import Permissions
 from .colour import Colour
 from .mixins import Hashable
+from .utils import snowflake_time
 
 class Role(Hashable):
     """Represents a Discord role in a :class:`Server`.
@@ -90,3 +91,8 @@ class Role(Hashable):
     def is_everyone(self):
         """Checks if the role is the @everyone role."""
         return self._is_everyone
+
+    @property
+    def created_at(self):
+        """Returns the role's creation time in UTC."""
+        return utils.snowflake_time(self.id)